According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 11 words with the pattern --R-I--G--. That is, ten letter words with 3rd letter R and 5th letter I and 8th letter G. In alphabetical order, they are:
carcinogen
cardialgia
cardialgic
cartilages
curtilages
fortilages
hermitages
sortileger
sortileges
vermifugal
vermifuges